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ANGEL APPLICATION 0.4.5

angel-app
ANGEL APPLICATION version 0.4.5 is disengaged into the hands of Angels!

This is another technical blow with regard to performance and stability in the 0.4 series of releases. The previous improvements have additionally been refined. It can be said with certainty that this release is the fastest ever. However, not much has happened in terms of visibility for end-users.

It should be noted that these performance enhancements are serving an important purpose: the expected lifetime theta of the ARCANUM CAPSULES stored in the ANGEL network is directly connected with the time dt needed to replace a bad medium with a good one (and replicate the content to it) [1]. The formula to calculate the lifetime is:

lifetime formula

Previous versions of the ANGEL APPLICATION (< 0.4.3) took about 10 days (in practice) to replicate and validate the current dataset in the ANGEL network, giving a lifetime of 4.13e8 years, which is about 5% of the current estimated age of the universe. This, obviously, is not good enough!

The improvements in the new version (0.4.5) make this number jump back to a sane value, namely 1.43e18 years, a number with 10 more zeros than the old version, surpassing the estimated age of the universe by the range of 100 million times. etoy.CORPORATION is back in eternity business.

For the nerds, here is the technical changelog:

  • on Mac OS X, the main window can now be closed without quitting the application (just for you agent.MONOROM ;-) )
  • mounting missioneternity.org is not forced in a hidden way anymore. Instead, on GUI startup, a check is performed that asks the end-user if he wants to become an ANGEL by backing up missioneternity data. This only happens on fresh installations.
  • added menu Help->Version History
  • added angel_app.worker, which implements boiled down map/reduce functionality
  • html directory listing changed to be more independant of the missioneternity.org website (css) and made it look more like a "technical" listing as opposed to looking like being part of the website
  • when syncing a collection that already exists, only sync the metadata
  • error handling refinements
  • optimized resource inspection by parallelizing network requests
  • optimized broadcast: parallelize broadcasting, essentially scaling O(1) instead of O(n). This saves about 1 hour per tree traversal right now. Also, only broadcasts to reachable clones that don't have the local node.
  • stability fixes in DirectoryDeadPropertyStore (file transactions and broken metadata)
  • optimized PROPPATCH: do not pingBack() to self
  • optimized PROPPATCH: use byte range based validation instead of full validation
  • optimized clone DNS resolution: resolve IP of local nodename, resolve all clone hostnames and check for IP doubles
  • added new config option to enable/disable parallelization in network requests, default on (common.workerforking = bool)
  • added new config variable in section 'common': 'repository-tmp'. This variable holds absolute paths, is optional and only relevant if you put the repository on a different mount point than angelHome. Atomic file renames cannot be done cross-device.

A download is available at http://angelapp.missioneternity.org/index.py/Download.

[1] Technical Report, Eternal Storage in Social Networks: MISSION ETERNITYs Angel-Application

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ANGEL APPLICATION 0.4.4

angel-app
ANGEL APPLICATION version 0.4.4 has just been released.
This release introduces major speed improvements in the maintenance algorithm
which should result in maintaining local replicas a lot quicker, while
preserving network resources during normal maintenance.

In practice:

For desktop users, the maintenance process will find individual local broken
resources (e.g. also new resources / deleted resources) much faster than in
earlier versions. This only holds true if the sleep interval is small, e.g. if
the maintainer has just been started (by default, the maintainer will
incrementally adjust its speed of operation to fit into one day).

For server installation, e.g. long-running instances, it means that a lot less
traffic will be generated during the maintenance.

Note: the initial sync is still slow and will be optimized in future releases.

The changes are basically summarized as follows:

  • initial support for doing remote clone validation based on random chunks of data. Implemented using standard HTTP byte range headers. This should lead to MASSIVE bandwidth savings.
  • improvements in clone resolution: clones with numeric IP addresses are thrown away if a clone with a hostname resolving to this address exists.
  • mount now forces the remote clone to be saved locally, even if the initial inspection fails.
  • bugfix in maintenance: when no local clones are stored, recursively walk up the tree to find some
  • broadcasting of local clone to remote clones optimized (e.g. dropped reachability and existence checks, as broadcasting is allowed to fail).
  • improved KDE/Gnome support for opening the WebDAV repository.
  • optimized server side HEAD operation for directories by not computing a content listing.
  • logging: use format strings

A download is available at http://angelapp.missioneternity.org/index.py/Download.

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ANGEL APPLICATION 0.4.3

angel-app
ANGEL APPLICATION version 0.4.3 has just been released by the etoy.MAD-CODER dept.

Unfortunately, a major bug slipped into the release of last week. This release fixes the problem and introduces minor networking improvements as well as an updated layout for the directory listing.

More detailed information can be found in the CHANGES file.

A download is available at http://angelapp.missioneternity.org/index.py/Download.

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ANGEL APPLICATION 0.4.2 "pollination"

angel-app
We're excited to announce the immediate availability of the ANGEL APPLICATION version 0.4.2 code-named "pollination", a peer-to-peer system for storing ARCANUM CAPSULES for eternity.

This is mainly a bugfix release over version 0.4.1 and improves performance and introduces download bandwidth throttling. Every Angel should upgrade.

More detailed information can be found in the CHANGES file.

A download is available at http://angelapp.missioneternity.org/index.py/Download.

UPDATE (May 22 2009): this release has a major bug, please fallback to a newer version as announced.

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harvesting April 1st hoaxes for future technologies

As in many years previously, on April 1st, a new RFC has been published: http://www.rfc-editor.org/rfc/rfc5514.txt

Obviously, it's a hoax. "IPv6 over Facebook" is not something anyone is gonna actually believe in, or even implement. But wait: the idea behind this joke is actually quite a good one: define an ipv6 prefix and assign another computed value to the rest of the address. What the hoax doesn't provide is working routability and compatibility with the existing ipv4 internet.

If you think the idea is ridiculous, consider this:

Some men see things as they are and say, ‘why?’ I dream of things the way they never were and say, ‘why not?’"
- Robert F. Kennedy, after George Bernard Shaw

The concept of computing new, dynamic ipv6 addresses is actually available in practice through the Teredo standard. There are different implementations out in the wild, one of which is free: Miredo. Teredo provides both global addressability and routability! And it is compatibe to the existing ipv4 internet infrastructure.

So how to use this technology for a social network, wherein every user/participant will receive a globally unique, dynamic and routable ip address? Simple, just make miredo part of the peer-to-peer software and make sure to enable ipv6 in the operating system.

This is what etoy.CORPORATION has implemented in the ANGEL APPLICATION. The ANGEL APPLICATION NETWORK, an arcane network of computers, is loosely connected via the internet, safeguarding and sharing digital fragments of MISSION ETERNITY PILOTS. The individual ANGELS are technically routed over the existing internet via virtual ipv6 addresses, just as the RFC hoax suggests. This is loosely documented in the ANGEL WIKI.

This april fools hoax is very interesting in the sense that ideas, be it for jokes, can turn out to be real world concepts/products that help us find new ways for experiencing culture, emotions, rituals, belief, life and death.

Timothy Leary's last words are reported to have been: "Why? Why not? WHY NOT? Why not? Why not? Why not?" and later, "Beautiful."

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Manifesta madness

At 2a.m. in the etoy.MULTIVERSE

Song by Spizzenergi

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good night from manifesta DAY 1

good night from bolzano,
curious artists are approaching our shining and shimmering
container like night blinded insects and
their faces appear behind the glass,
smiling ghosts.
the sarcophagus research panel seems to call them.





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planting the tank

if you enter the manifesta the tank is situated on your left, right at the entrance - everyone has to pass!
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etoy.TANK loading for manifesta7 in bolzano



Haevy work to shift the etoy.TANKS.
We did also move the kitchen / toilet module. but no time or fotos
YUP the new etoy.TANK has a toilet :)
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ANGEL APPLICATION 0.4.1 "zhong guo"

angel-app
We're pleased to announce the availability of version 0.4.1 中国 (zhong guo) of the ANGEL APPLICATION.

This is a pure bugfix release over version 0.4 and essentially fixes a network blocking issue in the maintenance loop.

More detailed information can be found in the CHANGES file.

A download is available at http://angelapp.missioneternity.org/index.py/Download.

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